Enum prost_types::field::Cardinality

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#[repr(i32)]pub enum Cardinality {
    Unknown,
    Optional,
    Required,
    Repeated,
}

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Whether a field is optional, required, or repeated.

Variants

Unknown

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For fields with unknown cardinality.

Optional

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For optional fields.

Required

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For required fields. Proto2 syntax only.

Repeated

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For repeated fields.

Implementations

impl Cardinality[−]

pub fn is_valid(value: i32) -> bool[−]

Returns true if value is a variant of Cardinality.

pub fn from_i32(value: i32) -> Option<Cardinality>[−]

Converts an i32 to a Cardinality, or None if value is not a valid variant.

Trait Implementations

impl Clone for Cardinality[+]

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fn clone(&self) -> Cardinality[−]

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Copy for Cardinality

impl Debug for Cardinality[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result[−]

Formats the value using the given formatter.

impl Default for Cardinality[+]

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fn default() -> Cardinality[−]

Returns the “default value” for a type.

impl Eq for Cardinality

impl From<Cardinality> for i32[+]

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fn from(value: Cardinality) -> i32[−]

Performs the conversion.

impl Hash for Cardinality[+]

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fn hash<__H: Hasher>(&self, state: &mut __H)[−]

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, [−]

Feeds a slice of this type into the given Hasher.

impl Ord for Cardinality[+]

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fn cmp(&self, other: &Cardinality) -> Ordering[−]

This method returns an Ordering between self and other.

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#[must_use]pub fn max(self, other: Self) -> Self[−]

Compares and returns the maximum of two values.

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#[must_use]pub fn min(self, other: Self) -> Self[−]

Compares and returns the minimum of two values.

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#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self[−]

Restrict a value to a certain interval.

impl PartialEq<Cardinality> for Cardinality[+]

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fn eq(&self, other: &Cardinality) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]pub fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialOrd<Cardinality> for Cardinality[+]

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fn partial_cmp(&self, other: &Cardinality) -> Option<Ordering>[−]

This method returns an ordering between self and other values if one exists.

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#[must_use]pub fn lt(&self, other: &Rhs) -> bool[−]

This method tests less than (for self and other) and is used by the < operator.

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#[must_use]pub fn le(&self, other: &Rhs) -> bool[−]

This method tests less than or equal to (for self and other) and is used by the <= operator.

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#[must_use]pub fn gt(&self, other: &Rhs) -> bool[−]

This method tests greater than (for self and other) and is used by the > operator.

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#[must_use]pub fn ge(&self, other: &Rhs) -> bool[−]

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for Cardinality

impl StructuralPartialEq for Cardinality